Personally, I'd like to see driving cost more everywhere. The case for a "congestion charge" that applies to the densest parts of the city is that those are the parts where the resource (car space) is so scarce that the need for some kind of rationing is most urgent. I suppose the alternative to a fee is some kind of administrative rationing, but that sounds nightmarish.
The big deal about it, to my way of thinking, is that it's the thin end of the wedge. Once you begin to establish the principle of internalizing the social costs of driving, you're on your way to dethroning the car.
Paying eight bucks to encumber some of the crowdedest street space in the world with a ton of metal doesn't actually seem so outrageous. A peak-hour round-trip ride from White Plains to Grand Central on the Metro-North railway costs more than twice that, and nobody regards this as an outrage, though there's a much better case for making the train ride free than for keeping Midtown driving free.